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3625416
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Information
Patent Grant
3625416
References
Source
Patent Number
3,625,416
Date Filed
Not available
Date Issued
Tuesday, December 7, 1971
52 years ago
CPC
G06K21/06 - Apparatus or tools adapted for slotting or otherwise marking information-retrieval cards
G06K21/02 - in which coincidence of markings is sensed mechanically
US Classifications
234 - Selective cutting
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